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#ifndef RECURSION11_H_
#define RECURSION11_H_
 
#include <iostream>
#include <algorithm>
 
using namespace std;
 
int solve(int n, int arr[], int k);
 
int median(int arr[], int sz) {
	int m = sz / 2;
	nth_element(arr, arr + m, arr + sz);
	return arr[m];
}
 
int main() {
  int n, k;
  cin >> n >> k;
 
  int* arr = new int[n];
  for (int i = 0; i < n; ++i) {
    cin >> arr[i];
  }
 
  cout << solve(n, arr, k) << "\n";
}
 
#endif // RECURSION11_H_

/usr/bin/ld: /home/MN6YnW/ccvTa2BQ.o: in function `main':
prog.cpp:(.text.startup+0x91): undefined reference to `solve(int, int*, int)'
collect2: error: ld returned 1 exit status

Standard output is empty